CS5535 Datasheet, PDF (1/555 Pages) National Semiconductor (TI) – Geode™ CS5535 I/O Companion Multi-Function South Bridge

Preliminary
July 2003
Revision 0.8
Geode™ CS5535 I/O Companion
Multi-Function South Bridge
General Description
The National Semiconductor^® Geode™ CS5535 is a com-
plete I/O companion for an integrated processor North
Bridge component such as the Geode GX2 processor
series. Together, the GX2 and CS5535 provide a system-
level solution well suited for the high-performance and low-
power needs of a host of information appliances that
include digital set-top boxes, personal access devices, and
thin client applications.
The internal architecture has been greatly simplified over
previous I/O companions by use of a single, high-perfor-
mance modular structure based on GeodeLink™ architec-
ture. This architecture yields high internal speed (over 4
GB/s) data movement and extremely versatile internal
power management. The GeodeLink architecture is trans-
parent to application software. Communication with the
GX2 processor is over a 33/66 MHz PCI bus.
The CS5535 incorporates many I/O functions, including
those found in typical SuperI/O chips, simplifying many
system designs. Since the graphics subsystem is entirely
contained in the GX2 processor, system interconnect is
simplified. The device contains state-of-the-art power man-
agement that enables systems, especially battery powered
systems, to significantly reduce power consumption.
Audio is supported by an internal controller, designed to
connect to multiple AC97 compatible codecs such as
National’s LM4550. An IR (infrared) port supports all popu-
lar IR communication protocols. The IR port is shared with
one of two industry-standard serial ports that can reach
speeds of 115.2 kbps. An LPC (low pin count) port is pro-
vided to facilitate connections to a SuperI/O should addi-
tional expansion, such as a floppy drive, be necessary,
and/or to an LPC ROM for the system BIOS.
Geode™ CS5535 Block Diagram
Test/Reset
Interface
GeodeLink™ Control
Processor (GLCP)
External USB
Ports 1-1 & 1-2
USB Controller #1
(USBC1)
External USB
Ports 2-1 & 2-2
USB Controller #2
(USBC2)
External
Audio
AC97 Controller
(ACC)
External
IDE/Flash
ATA-5 Controller
(ATAC)
System Power
Voltages
Low Voltage
Detect (LVD)
Power Good
for Power On
Reset (POR)
GeodeLink™
Interface
Unit
(GLIU)
Geode™ GX2 Interface
PCI
33 or 66 MHz
GeodeLink™ PCI
South Bridge
(GLPCI_SB)
Diverse Integration Logic (DIVIL)
82xx PC
Legacy
UART (2)
& IR (1)
SMB
Controller
Flash
LPC
Interface
Port
RTC &
CMOS RAM
GPIO
Diverse
Device (DD)
Power
Mgmnt
MFGP
Timers
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